Circuit for setting lamp current has source providing control voltage outside evaluation range with dimmer input open; push button switch can be used as dimming signal generator

摘要

The circuit has a dimmer input (6) with maximum and minimum permitted current levels for connecting a dimming signal generator (2). The dimmer input is connected to an evaluation stage and to a source of a control voltage in parallel with the dimming input. There is a stage for setting the lamp current. The control voltage from the source stage with the dimmer input open lies outside the evaluation range of the control voltage and a push button switch can be used as a dimming signal generator instead of a conventional control unit Independent claims are also included for the following: a method of setting the light current in a lamp.